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CVE Record

CVE-2025-14831: Gnutls: gnutls: denial of service via excessive resource consumption during certificate verification

A flaw was found in GnuTLS. This vulnerability allows a denial of service (DoS) by excessive CPU (Central Processing Unit) and memory consumption via specially crafted malicious certificates containing a large number of name constraints and subject alternative names (SANs).

MediumCVSS 5.3Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

A malicious certificate can force GnuTLS to consume excessive CPU and memory while checking certificate names. Affected services may slow down or become unavailable. The supplied evidence indicates an availability risk, not data theft or alteration.

Executive priority

Treat this as a normal-priority availability issue, accelerated for exposed authentication, proxy, messaging, or other certificate-dependent services. It does not warrant critical-incident handling from the supplied evidence, but unpatched high-availability systems could experience operational disruption.

Technical view

CVE-2025-14831 is a CWE-407 resource-consumption flaw in GnuTLS certificate verification. Certificates containing many name constraints and subject alternative names can trigger excessive processing. CVSS 3.1 scores it 5.3: network-accessible, low complexity, unauthenticated, no user interaction, with low availability impact.

Likely exposure

Exposure is most likely where affected GnuTLS or related Red Hat packages verify certificates supplied through untrusted network connections. The bundle identifies multiple RHEL 8, 9, and 10 lifecycle streams, but does not establish a complete upstream version range.

Exploitation context

The supplied record is not in CISA KEV, and no cited source reports active exploitation. The CVSS vector indicates remote, unauthenticated triggering with low attack complexity. This supports credible denial-of-service risk but does not prove exploitation is occurring.

Researcher notes

The bundle contains duplicate RHEL entries, a generic GnuTLS version value of "0," and affected records involving both gnutls and libtasn1. Do not infer a universal affected or fixed version range from this data. Validate each distribution and lifecycle stream against its specific vendor advisory.

Mitigation direction

  • Inventory GnuTLS and related libtasn1 packages across the listed RHEL lifecycle streams.
  • Consult the matching Red Hat advisory for its vendor-prescribed update or mitigation.
  • Prioritize systems that verify certificates received from untrusted networks.
  • Use resource controls and service monitoring to limit disruption while remediation is pending.

Validation and detection

  • Compare installed package versions and lifecycle streams with the applicable Red Hat advisory.
  • Identify services and clients that use GnuTLS for certificate verification.
  • Confirm whether untrusted peers can present certificates to each affected verification path.
  • Monitor certificate-processing workloads for abnormal CPU, memory, latency, or service restarts.
  • After remediation, verify package state and repeat safe certificate-validation regression tests.
Prepared
Confidence
medium
Sources
6

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cwe · low confidence lookup

CWE-407: Exact CWE lookup

Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

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description · low confidence lookup

Container behavior lookup

The affected technology mentions containers, so container-specific ATT&CK technique review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

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cve · low confidence lookup

CVE-2025-14831 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
5.3 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
5Timeline events
2ADP providers
29Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: yesTechnical Impact: partial

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
5.3CVSS 3.1MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L3.91.4redhat

Vulnerability scoring details

Base CVSS 3.1 score

5.3Medium
CVSS 3.1 vector shape for CVE-2025-14831Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. Source timelineredhat

    Reported to Red Hat.

  3. Source timelineredhat

    Made public.

  4. CVE publishedCVE Program

    The CVE record was published.

  5. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc
siemens-SADPADP container

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
Unknown vendorgnutlsgnutls, 0Listed
Red HatRed Hat Enterprise Linux 10gnutls, 0:3.8.10-3.el10_1affected
Red HatRed Hat Enterprise Linux 10.0 Extended Update Supportgnutls, 0:3.8.9-9.el10_0.17affected
Red HatRed Hat Enterprise Linux 8gnutls, 0:3.6.16-8.el8_10.5affected
Red HatRed Hat Enterprise Linux 8gnutls, 0:3.6.16-8.el8_10.5affected
Red HatRed Hat Enterprise Linux 8.4 Advanced Mission Critical Update Supportgnutls, 0:3.6.14-10.el8_4.1affected
Red HatRed Hat Enterprise Linux 8.4 Advanced Mission Critical Update Supportlibtasn1, 0:4.13-3.el8_4.1affected
Red HatRed Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-Ongnutls, 0:3.6.14-10.el8_4.1affected
Red HatRed Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-Onlibtasn1, 0:4.13-3.el8_4.1affected
Red HatRed Hat Enterprise Linux 8.6 Advanced Mission Critical Update Supportgnutls, 0:3.6.16-5.el8_6.5affected
Red HatRed Hat Enterprise Linux 8.6 Advanced Mission Critical Update Supportlibtasn1, 0:4.13-3.el8_6.2affected
Red HatRed Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-Ongnutls, 0:3.6.16-5.el8_6.5affected
Red HatRed Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-Onlibtasn1, 0:4.13-3.el8_6.2affected
Red HatRed Hat Enterprise Linux 8.8 Telecommunications Update Servicegnutls, 0:3.6.16-7.el8_8.4affected
Red HatRed Hat Enterprise Linux 8.8 Telecommunications Update Servicelibtasn1, 0:4.13-4.el8_8.1affected
Red HatRed Hat Enterprise Linux 8.8 Update Services for SAP Solutionsgnutls, 0:3.6.16-7.el8_8.4affected
Red HatRed Hat Enterprise Linux 8.8 Update Services for SAP Solutionslibtasn1, 0:4.13-4.el8_8.1affected
Red HatRed Hat Enterprise Linux 9gnutls, 0:3.8.3-10.el9_7affected
Red HatRed Hat Enterprise Linux 9gnutls, 0:3.8.3-10.el9_7affected
Red HatRed Hat Enterprise Linux 9.2 Update Services for SAP Solutionsgnutls, 0:3.7.6-21.el9_2.5affected
Red HatRed Hat Enterprise Linux 9.4 Extended Update Supportgnutls, 0:3.8.3-4.el9_4.5affected
Red HatRed Hat Enterprise Linux 9.6 Extended Update Supportgnutls, 0:3.8.3-6.el9_6.3affected
Red HatRHEL-8 based Middleware Containersrhpam-7/rhpam-businesscentral-monitoring-rhel8, 7.13.5-4.1777325677affected
Red HatRHEL-8 based Middleware Containersrhpam-7/rhpam-businesscentral-rhel8, 7.13.5-4.1777325711affected
Red HatRHEL-8 based Middleware Containersrhpam-7/rhpam-controller-rhel8, 7.13.5-4.1777325710affected
Red HatRHEL-8 based Middleware Containersrhpam-7/rhpam-dashbuilder-rhel8, 7.13.5-3.1777325680affected
Red HatRHEL-8 based Middleware Containersrhpam-7/rhpam-kieserver-rhel8, 7.13.5-4.1777325709affected
Red HatRHEL-8 based Middleware Containersrhpam-7/rhpam-process-migration-rhel8, 7.13.5-4.1777325680affected
Red HatRHEL-8 based Middleware Containersrhpam-7/rhpam-smartrouter-rhel8, 7.13.5-4.1777325708affected
Red HatRed Hat AI Inference Server 3.2rhaiis/model-opt-cuda-rhel9, 1780681984affected
Weakness

CWE details

CWE-407

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.

CWE-407 · source CWE mapping

Inefficient Algorithmic Complexity

Inefficient Algorithmic Complexity represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

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